C++ (Cpp) SDL_EVDEV_kbd_load_keymaps Examples

Example #1

File: SDL_evdev_kbd.c Project: ibachar/firecube

SDL_EVDEV_keyboard_state *
SDL_EVDEV_kbd_init(void)
{
    SDL_EVDEV_keyboard_state *kbd;
    int i;
    char flag_state;
    char shift_state[2] = {TIOCL_GETSHIFTSTATE, 0};

    kbd = (SDL_EVDEV_keyboard_state *)SDL_calloc(1, sizeof(*kbd));
    if (!kbd) {
        return NULL;
    }

    kbd->npadch = -1;

    /* This might fail if we're not connected to a tty (e.g. on the Steam Link) */
    kbd->console_fd = open("/dev/tty", O_RDONLY);

    if (ioctl(kbd->console_fd, TIOCLINUX, shift_state) == 0) {
        kbd->shift_state = *shift_state;
    }

    if (ioctl(kbd->console_fd, KDGKBLED, &flag_state) == 0) {
        kbd->ledflagstate = flag_state;
    }

    kbd->accents = &default_accents;
    if (ioctl(kbd->console_fd, KDGKBDIACR, kbd->accents) < 0) {
        /* No worries, we'll use the default accent table */
    }

    kbd->key_maps = default_key_maps;
    if (ioctl(kbd->console_fd, KDGKBMODE, &kbd->old_kbd_mode) == 0) {
        /* Set the keyboard in UNICODE mode and load the keymaps */
        ioctl(kbd->console_fd, KDSKBMODE, K_UNICODE);

        if (SDL_EVDEV_kbd_load_keymaps(kbd) < 0) {
            for (i = 0; i < MAX_NR_KEYMAPS; ++i) {
                if (kbd->key_maps[i]) {
                    SDL_free(kbd->key_maps[i]);
                }
            }
            SDL_free(kbd->key_maps);

            kbd->key_maps = default_key_maps;
        }

        /* Allow inhibiting keyboard mute with env. variable for debugging etc. */
        if (getenv("SDL_INPUT_LINUX_KEEP_KBD") == NULL) {
            /* Mute the keyboard so keystrokes only generate evdev events
             * and do not leak through to the console
             */
            ioctl(kbd->console_fd, KDSKBMODE, K_OFF);

            /* Make sure to restore keyboard if application fails to call
             * SDL_Quit before exit or fatal signal is raised.
             */
            if (!SDL_GetHintBoolean(SDL_HINT_NO_SIGNAL_HANDLERS, SDL_FALSE)) {
                kbd_register_emerg_cleanup(kbd);
            }
        }
    }

#ifdef DUMP_ACCENTS
    SDL_EVDEV_dump_accents(kbd);
#endif
#ifdef DUMP_KEYMAP
    SDL_EVDEV_dump_keymap(kbd);
#endif
    return kbd;
}

Example #2

File: SDL_evdev_kbd.c Project: Evengard/UniMod

SDL_EVDEV_keyboard_state *
SDL_EVDEV_kbd_init(void)
{
    SDL_EVDEV_keyboard_state *kbd;
    int i;
    char flag_state;
    char shift_state[2] = {TIOCL_GETSHIFTSTATE, 0};

    kbd = (SDL_EVDEV_keyboard_state *)SDL_calloc(1, sizeof(*kbd));
    if (!kbd) {
        return NULL;
    }

    kbd->npadch = -1;

    /* This might fail if we're not connected to a tty (e.g. on the Steam Link) */
    kbd->console_fd = open("/dev/tty", O_RDONLY);

    if (ioctl(kbd->console_fd, TIOCLINUX, shift_state) == 0) {
        kbd->shift_state = *shift_state;
    }

    if (ioctl(kbd->console_fd, KDGKBLED, &flag_state) == 0) {
        kbd->ledflagstate = flag_state;
    }

    kbd->accents = &default_accents;
    if (ioctl(kbd->console_fd, KDGKBDIACR, kbd->accents) < 0) {
        /* No worries, we'll use the default accent table */
    }

    kbd->key_maps = default_key_maps;
    if (ioctl(kbd->console_fd, KDGKBMODE, &kbd->old_kbd_mode) == 0) {
        /* Set the keyboard in UNICODE mode and load the keymaps */
        ioctl(kbd->console_fd, KDSKBMODE, K_UNICODE);

        if (SDL_EVDEV_kbd_load_keymaps(kbd) < 0) {
            for (i = 0; i < MAX_NR_KEYMAPS; ++i) {
                if (kbd->key_maps[i]) {
                    SDL_free(kbd->key_maps[i]);
                }
            }
            SDL_free(kbd->key_maps);

            kbd->key_maps = default_key_maps;
        }

        /* Mute the keyboard so keystrokes only generate evdev events
         * and do not leak through to the console
         */
        ioctl(kbd->console_fd, KDSKBMODE, K_OFF);
    }

#ifdef DUMP_ACCENTS
    SDL_EVDEV_dump_accents(kbd);
#endif
#ifdef DUMP_KEYMAP
    SDL_EVDEV_dump_keymap(kbd);
#endif
    return kbd;
}